<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <script src="react-demos/build/react.development.js"></script>
        <script src="react-demos/build/react-dom.development.js"></script>
        <script src="react-demos/build/babel.min.js"></script>
    </head>
    <body>
        <div id="example"></div>
        <script type="text/babel">
        class Input extends React.Component {
            constructor(props) {
            super(props)
            this.state = {
                value: 'Hello!'
            }
            this.handleChange = this.handleChange.bind(this)
            }
            handleChange(event) {
            this.setState({ value: event.target.value });
            }
            render() {
            var value = this.state.value;
            return (
                <div>
                <input type="text" value={value} onChange={this.handleChange} />
                <p>{value}</p>
                </div>
            );
            }
        }
            
        ReactDOM.render(<Input/>, document.getElementById('example'));
        </script>
      </body>
</html>